When it comes to health, it’s better to be safe than sorry. Click here for the answer and explanation.

Explanation:

B - Incorrect: This option incorrectly compares two different entities: Tempos and mass administration of anti-parasitic drugs.

C - Incorrect: This option incorrectly compares two different entities: Tempos and mass administration of anti-parasitic drugs.

D - Incorrect: This option changes the meaning of the sentence as while implies at the same time. Further, to purify the few ambiguously refers to health experts.

E - Incorrect: The use of degree actually cannot come at the end of the clause as it must precede an adjective/ adverb or participle.

A - Correct: This option correctly compares two parallel entities: application of Tempos and mass administration of anti-parasitic drugs.

Correct choice is A.