Readers who purchase singer/actress jennifer hudson's i got this: how i changed my ways and lost what weighed me down will most likely read about
a. things that worked for hudson, but might not work for them.
b things that worked for hudson and will work for them
c. advice from hudson that they need to achieve their goals.
d. advice from hudson that will them create a healthy lifestyle.

A would be correct because anything that works for someone else may or may not work for you.  It's also clear that she's sharing what worked for her.  But also C and D fit because she could provide advice about how to achieve your own goals and get a healthy lifestyle.  The reason I would choose A over the rest is because the title of the book does not say she's providing advice on what to do or not do.  She is just sharing her experience with you.  It may or may not help you and it might be something you can try but might not work for you. The other two would assume too much and not enough information was provided to make the assumption. 

Ithink it's d or it can be itger

Muscles in the body us with a lot of things for example, if i wanted to lift a heavy box and had no muscle i would just collapse where i was because of the fact muscles hold us together. overall they are 650 muscle in the human body, all of them have different purposes and ways to keep us together. there are three types of muscle in the body skeletal, smooth, and cardiac muscle. skeletal muscle are attached to the bone and with movement. smooth muscle, this is found in the wall of our organs, such as our stomach, this muscle with movement   as well, without this muscle, we would only be allowed to eat small amounts. the cardiac muscle is the heart muscle and probably the most important one. these are only found in the walls of the heart and the heart pump blood to the other parts of your body. we have two different types of muscle fibers, slow twitch and fast twitch. slow twitch muscles enable long-endurance feats such as distance running. fast twitch fatigue faster but are used in powerful bursts of movements like sprinting. there are three different types of muscle contractions concentric, eccentric, isometric. concentric contraction causes muscles to shorten, thereby generating force.   eccentric contractions cause muscles to elongate in response to a greater opposing force. isometric contractions generate force without changing the length of the muscle.: //athleticquickness.com/muscle-contraction-types-part-1/