On which chromosome does the factor VIII locus reside?

Which of the following is an example of applying persistence in problem solving?

a. Accepting that an insurance company cannot resolve a claim b. Becoming frustrated when being placed on hold for too long c. Explaining to a patient that you simply cannot help them d. Performing research on the Internet to seek an alternative to something

Elastic and smooth muscle fibers are primarily found in the tunica ________ of blood vessels

A) collateralus B) media C) adventitia D) intima