Baroque melodies often area. elaborate and ornamental. b. easy to sing and remember. c. impossible to play. d. short and simple.

A. elaborate and ornamental

Explanation:

Baroque style always means very elaborate and intricate.  It's a style, in all forms of arts, that is meant to push the skills to the limit and be as flamboyant as possible.

In the case of baroque melodies, they are elaborate and ornamental, with lots of "extra notes" and complex arrangements.