The correct answer is strong point.
A. fortified place
B. period of two weeks
C. without delay
D. strong point
The correct answer is (D) The strong point (of someone or something); that in which someone excels. Also, that strongest part of the blade of a sword between the middle and the hilt.
Forte comes from French fort (strong).
Examples of use:
- She considered her good looks to be her forte.
- His forte was his persuasive manner and ability to think on his feet.