OFFICIAL EXPLANATION
Concerned for the welfare of their marine wildlife, many countries have installed laws requiring that fishermen hold permits specific to certain areas, perhaps an important turning point in conservation history.A. Concerned for the welfare of their marine wildlife, many countries have installed laws requiring that fishermen hold permits specific to certain areas, perhaps an important turning point in conservation history
Require is one of the nine verbs to which the Subjunctive rule applies (if it is followed by that). This means that the next verb after requiring that should be in base form (hold).B. Perhaps an important turning point in conservation history, many countries, concerned for the welfare of their marine wildlife, have installed laws requiring that fishermen will hold permits specific to certain area
This answer choice is grammatically incorrect. Require is one of the nine verbs to which the Subjunctive rule applies (if it is followed by that). This means that the next verb after requiring that should be in base form. However, will hold is not in base form.
What helps us identify this question as a Subjunctive question as well as identify the mistake is the following Stop Sign: propose/recommend/require/request/insist/suggest/mandate/ask/demand that
Whenever you come across this Stop Sign, make sure that the following verb is in its base form.C. Many countries, concerned for the welfare of their marine wildlife, have installed laws requiring that fishermen hold permits specific to certain areas, maybe an important turning point in conservation history
The word maybe is considered too simple for the GMAT. Thus, whenever you see it in a Sentence Correction question, eliminate all answer choices that include it, and choose answer choices that use perhaps, possibly or probably instead.D. Concerned for the welfare of their marine wildlife, many countries installed laws requiring that fishermen holding permits specific to certain areas, perhaps an important turning point in conservation history
This answer choice is grammatically incorrect. Require is one of the nine verbs to which the Subjunctive rule applies (if it is followed by that). This means that the next verb after requiring that should be in base form. However, holding is not in base form.
What helps us identify this question as a Subjunctive question as well as identify the mistake is the following Stop Sign: propose/recommend/require/request/insist/suggest/mandate/ask/demand that
Whenever you come across this Stop Sign, make sure that the following verb is in its base form.E. Concerned for the welfare of their marine wildlife, and maybe an important turning point in conservation history, many countries have installed laws requiring that fishermen hold permits specific to certain area
The word maybe is considered too simple for the GMAT. Thus, whenever you see it in a Sentence Correction question, eliminate all answer choices that include it, and choose answer choices that use perhaps, possibly or probably instead.