She ____ for the upcoming tennis tournament.

The sentence “She ____ for the upcoming tennis tournament” requires the present continuous tense, “is training,” to indicate an ongoing action preparing for a future event. In English grammar, the present continuous (is/are + verb-ing) is used for actions happening now or planned in the near future. Options A (simple present, habitual), C (past tense, completed), and D (future, not ongoing) do not fit the context of current preparation, making B the correct answer.