Answer:
B) A semicolon
Explanation:
A semicolon is a punctuation mark used to join two clauses together.. These clauses must be independent. These independent clauses are joined by a semicolon to form a complete sentence. On the other hand, a comma is used to separate clauses or objects in a sentence or phrase. A semicolon should not be used in place of a colon or comma. All three have their own duties. A colon is used when an emphasis is about to be made or when listing items. A hyphen is used to join two or more words but without spacing
An apostrophe is used when a word was omitted.
It is safe when you have metal detector because it can also sensor thieves or shoplifter who wish to bring clothes outside the store. Metal detectors are useful to find hidden metal objects and can detect not just nearby but even metal objects buried underground.
I also think that they answer is b.
