Does the following sentence correctly use a semicolon? Why or why not? "The two most common causes of a headache are dehydration and exhaustion; both causes are easily remedied." The semicolon is used correctly. It's essential to connect these two ideas. O It is used incorrectly. The phrase following the semicolon is dependent. The semicolon is used incorrectly. A colon would have been more appropriate. O The semicolon is used correctly. It separates two equal parts that are independent.