Question:

Which sentence is punctuated correctly?

A These were the items on the shopping list: eggs, milk, bread, peanut butter, and jelly.

Explaination

The colon in this sentence correctly introduces a list of items. In answer "We were uncertain about the terrain ahead; and had lost the map.", the semicolon should be a comma. In answer "Is there any way that we can meet later.", there should be a question mark instead of a period. In answer about Mary, the comma should be a semicolon.