Question

Choose the well punctuated conjunctive adverb to complete the sentence.These obvious contamination problems have long been known____what is not often realised is the organic matter carried in ground water can contaminate samples. " a. ,however, " "b. :however," "c. ; however, " d. However

Answer 1

Answer:

The correctly punctuated conjunctive adverb can be found in option c. ; however,

The sentence is then:

These obvious contamination problems have long been known; however, what is not often realised is the organic matter carried in ground water can contaminate samples.

Explanation:

"However" indicates a relationship of contrast between two independent clauses. When we wish to join those clauses to form a compound sentence, we must punctuate properly. The right way to do it is by placing a semicolon before and a comma after "however". This is why letter C is correct.

Another possibility would be using a full stop/period before "however" and a comma after it. In this case, we would not be forming a compound sentence, though. Letter D is incorrect because it is missing both the period and the comma. Letters A and B do not follow any of those possibilities.