1. Rosa sent out more than 100 job application letters. Only three of the companies responded. The most effective way to combine these sentences would be:
a. Rosa sent out more than 100 job application letters, and only three of the companies responded.
b. Rosa sent out more than 100 job application letters, but only three of the companies responded.
c. Rosa sent out more than 100 job application letters, so three of the companies responded.

I believe the answer is B

depends on your school

when i was in high school i took ap biology my senior year and it was the hardest one for me because my teacher finished the material within the first month of school and then went on to doing advanced college level it was horrible. but at a nearby school ap biology was one of the easier aps. also, it depends on what you are interested i like math a lot so ap calculus was easier for me than most but i hate history so ap us government was harder for me than most.

feel very well should be good