With all the recent research into biometrics, security measures that

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Here is a detailed explanation to this question-


Choice A: This answer choice incorrectly utilizes the present perfect continuous verb "have been becoming"; this tense is only to be used when referring to an action that began at a fixed point in the past and is continuing into the present. Additionally, this answer choice incorrectly uses "gradually" to modify the adjective "obsolete" rather than the verb "have been becoming". Thus, this answer choice is incorrect.

Choice B: This answer choice correctly conveys the meaning of the sentence, maintains proper tense use, and is quite concise. Thus, this answer choice is correct.

Choice C: This answer choice shifts the status of measures such as passwords and pins to the past tense, through the use of the verb "were", implying that such measures are no longer easily crackable. Furthermore, the use of the verb "being" alters the meaning of the sentence completely. Thus, this answer choice is incorrect.

Choice D: This answer choice incorrectly uses the word "like" to refer to an example. This answer choice also repeats the tense-related error seen in Option A. Finally, this answer choice is needlessly wordy due to the use of the phrase "becoming in a gradual way". Thus, this answer choice is incorrect.

Choice E: This answer choice incorrectly modifies "security measures" with the phrase "having been so easily cracked". This answer choice also repeats the modification error seen in Option A. Thus, this answer choice is incorrect.

Hence, B is the best answer choice.

To understand the concept of "Present Perfect Continuous Tense on GMAT", you may want to watch the following video (~1 minute):



To understand the concept of "Like v/s As on GMAT", you may want to watch the following video (~1 minute):



All the best!
Experts' Global Team