Which one of the following actions is more appropriate for dealing with major frustrations than with minor frustrations a. gaining control of your life b. blowing off steam c. using positive self-talk b. performing a physicl activity

This answer is quite tricky because it could be A (gaining control of your life) or D (performing aphysical activity).

Performing some physical activity is a very helpful way of dealing with frustrations that are major or minor. Physical activity in general has many beneficial effects (also including higher self-esteem for example). 

However, if the mentioned frustration in your life is major, I would say one needs to rethink certain aspects of one's life, take a step back and see what and where should be done to improve this frustration.

For this reason I would say it's more likely that A is the answer. Hope this will help you :)

Difference between normal and abnormal tissue is much clearer on mri than on ct and mri much suitable to view soft tissues

Ibelieve this would be an obstacle.