Correct the sentence below:
Industrialization and modern methods of insect control have improved the standard of living around the globe while at the same time they have introduced some 100,000 dangerous chemical pollutants, having gone virtually unregulated since they were developed more than 50 years ago.(A) while at the same time they have introduced some 100,000 dangerous chemical pollutants, having(B) while at the same time introducing some 100,000 dangerous chemical pollutants that have(C) while they have introduced some 100,000 dangerous chemical pollutants at the same time, which have(D) but introducing some 100,000 dangerous chemical pollutants at the same time that have(E) but at the same time introducing some 100,000 dangerous chemical pollutants, having

B). While at the same time introducing some 100,000 dangerous chemical pollutants that have.

Explanation:

As per the question, option B i.e. 'while at the same time introducing some 100,000 dangerous chemical pollutants that have' displays the sentence that correctly revises the underlined phrase as it appropriately employs the 'introducing'(in simple present form) which makes it correct both grammatically and syntactically. The other options are either grammatically incorrect(incorrect use of modifier in option C) or involves an incorrect cause-effect scenario(in options A and D). Therefore, option B is the correct answer.

dick

explanation:

kennedy creates personal credibility by saying he is more than fit to lead. he talks about the sixty day period that he constructed administration, and says based on that he will be an acceptable leader.

jfk has a great reputation as an american citizen. he fought in wwii, and earned the navy and marine corps medal. he saved several men on his pt-109 patrol torpedo boat after an attack by the japanese navy. he also served in congress for the 11th congressional district for massachusetts, and served three terms in the house of representatives.

explanation: