The Textbook Described a Study of Keystroke Forces and Times

The textbook described a study of keystroke forces and times in expressive piano playing. The study showed that when pianists changed the forces of their keystrokes to communicate phrasing, the timing of the keystrokes

A) Changed as well, meaning that timing changes must always be linked to force changes
B) Changed as well, meaning that timing changes need not be linked to force changes
C) Did not change, meaning that timing changes must always be linked to force changes
D) Did not change, meaning that timing changes need not be linked to force changes