Chapter 20, Problem 9RA

Which of these statements is true?

$\begin{array}{l}\text{a}\text{. Sperm are not motile until they pass through the epididymis}\text{.}\hfill \\ \text{b}\text{. Sperm require capacitation in the female reproductive tract before they can fertilize an ovum}\text{.}\hfill \\ \text{c}\text{. A secondary oocyte does not complete meiotic division until it has been fertilized}\text{.}\hfill \\ \text{d}\text{. All of these are true}\text{.}\hfill \end{array}$