After Staying Home for Almost Two Decades to Raise His

After staying home for almost two decades to raise his children, Howard wants to go back to work in the TV repair business, which was his profession before becoming a stay-at-home parent. What can be said about Howard?

A) After taking a break from the workforce, Howard will have higher human capital.
B) Howard's knowledge of how to repair TVs is obsolete, and his human capital is less valuable now than it was before he became a stay-at-home parent.
C) Howard's human capital has stayed constant; once gained, human capital cannot be lost.
D) None of these are true about Howard.