Example 1: Alex began putting money in his 401(k) in his early 20s; consequently, he will have financial security when he retires.
Example 2: Louise is the most qualified candidate for the position; therefore, we should hire her.

Identify the correctly written compound sentences. Check all that apply.

a. All e-mail, even once deleted, is retrievable and, therefore, you should avoid sending sensitive information in an e-mail.
b. E-mail facilitates collaboration between people in remote locations; however, when collaboration requires the exchange of large data files, it is often easier to use web-based collaboration software.
c. Many people prefer e-mail over phone conversations, they leave a written record.
d. E-mail can be an efficient way to communicate, and it makes communicating across time zones much easier.

b. E-mail facilitates collaboration between people in remote locations; however, when collaboration requires the exchange of large data files, it is often easier to use web-based collaboration software.

d. E-mail can be an efficient way to communicate, and it makes communicating across time zones much easier.

Explanation

Sentence B is correct because it employs the use of a semicolon to separate two independent clauses. The use of the conjunction, however, helps to separate two sentences that have opposite connotations.

Sentence D is correct because the conjunction, and, was used appropriately to add a second thought to the sentence. The comma was also used correctly as it spliced the sentence and was immediately followed by the conjunction, and.