I need help in these questions. Please answer them 100% correctly. Please make them correct, dont answer wrong, be sure.

46. Debt securities with good marketability have: A. Higher prices and lower yields B. Higher prices and higher yields C. Tax liability less than the rate of inflation D. Zero interest rate risk 44. Once an investor has assembled a well-diversified stock portfolio, her major concern is: a. systematic risk b. the risk-free rate c. idiosyncratic risk d. axiomatic return