Answer:
practice, run-through, drill, etc.
I may be wrong but i think it’s A
D to Db is a half step. Look at the keys B and C on the keyboard, there is no key in between them which means it is a half step. A whole step is two keys up (either black or white) therefore, D to Db would be a half step.
A typeface is a particular design of type.
Serifs are semi-structural details or small decorative flourishes at the ends of some strokes that have made letters and symbols. For example, most teachers like it when their students use Times New Roman font. Sans serif does not have these details or flourishes. Another example would be the Arial font.
