Question

choose the option that is, or that includes, a run-on sentence (a comma splice or a fused sentence).
○ companies have found that at-home workers are often more productive than those who come to the office. working at home can allow people to focus more.
○ companies have found that at-home workers are often more productive than those who come to the office, working at home can allow people to focus more.
○ companies have found that at-home workers are often more productive than those who come to the office; specifically, working at home can allow people to focus more.
○ companies have found that at-home workers are often more productive than those who come to the office, for working at home can allow people to focus more.

Explanation:

A run - on sentence (comma splice or fused sentence) occurs when two independent clauses are improperly joined. In the second option, "Companies have found that at - home workers are often more productive than those who come to the office" and "working at home can allow people to focus more" are two independent clauses joined only by a comma, which is a comma splice (a type of run - on sentence). The first option has two separate sentences, the third uses a semicolon (properly separating clauses), and the fourth uses "for" (a subordinating conjunction) to properly connect the clauses.

Answer:

B. Companies have found that at - home workers are often more productive than those who come to the office, working at home can allow people to focus more.