Answer:
The word "semiannual" means:
B) twice a year.
Step-by-step explanation:
First, let's understand the main word. Annual is a synonym to yearly. If we have an annual event, that means the event takes place once a year.
However, the word we're working with is "semiannual". Semi is a prefix, a word that is added to the beginning of another one to transform it into a new word. Semi means "happening once halfway through a specific time period", according to what was provided in the question. Therefore, if an event is semiannual, it means it takes place "once halfway" a year. Halfway a year is six months. The event takes place once every six months. Thus, the event happens twice a year.