Which sentence below is properly punctuated?

a. babette followed her boss's example: when he left for the day, she disappeared.
b. babette followed her boss's example, when he left for the day, she disappeared.
c. babette followed her boss's example when he left for the day, she disappeared.

A

Explanation:

A semicolon is necessary to distinguish the "introductory" phrase from the introduced element, and that role cannot be fulfilled by a comma as in the second option, much less by the absence of punctuation as in the third option, which makes the sentence even more chaotic.

hey kid learn to actually put time and effort into your school work and maybe you would get higher grades and not have to come on this website and beg for answer's

d. pushing his plate away from the edge of the table idk what the other guy was trying to