Describe any challenges or hesitations you could have about your goals you set or the activity requirements for the course? IF YOU CAN HELP ME THAT WOULD BE AWESOME!! I WILL MARK YOU BRAINLIEST AND GIVE YOU EXTRA POINTS>>

Well everybody's different but in my case, some challenges or hesitations I have is that I feel or believe that I can't do it sometimes, but, self confidence gets me out of those thoughts and I achieve but sometimes I nearly give up. That's why self confidence is so important, also, distractions like games and even some times friends can challenge you from achieving your goals      

answer is d. graphite coatings.

some connecting rods have _graphite coatings_ to lubricate the cylinder wall or piston pin.