Genetics-based drugs, an emerging class of medications, are likely to

OFFICIAL EXPLANATION



• • Native speakers, and those who listen to native speakers, take note:
there is no such thing as TRY AND.

→ This idiom is botched more often than "10 items or less [fewer!]" and is tested by GMAC.

→ The correct idiom is try TO
You can even use try ___ING -- but not try and.

• Split #1: Verb tense

The phrases emerging class of medications and are likely to be tailored signal that the sentence is referring to an event that has not yet occurred (pricing).

Consequently, the future tense (will try) should be used in order to convey the most logical meaning.

Options B (have tried), C (try), and D (try) incorrectly use present perfect, simple present, and simple present, respectively.

The correct tense is simple future: drug companies will try to charge special prices for individualized medications, prices that the drug companies do not now charge.
Eliminate B, C, and D

• Split #2: TRY TO is correct. TRY AND is wrong.

Most native speakers do not know that this rule is a rule.
Listen, for example, to news anchors.
Okay, wait, I amend: listen to news anchors on good channels such as CNN, BBC, Al Jazeera, and the like.
Only a few of those very well-spoken anchors avoid the use of try and.

GMAC does not accept try and when we mean try to.
Don't go overboard. though.
The rule applies when you are using "try" in the sense of "Try to do X [in order] to get Y." or "I will try to do X in order to achieve Y or because I promised to do X . . . "

You will not see this sentence on the GMAT, but it is fine because it joins two infinitives: With respect to my obligation to exonerate wrongly imprisoned people, I promise to try every avenue and to keep trying if I fail.

Eliminate option A.

By POE, option E is the correct answer.

COMMENTS

The future tense can be a little weird for non-native speakers.
Try not to worry too much.
For one thing, future tense is relatively rarely tested.
For another, you will quickly get a handle on when to use simple future if you read (novels, newspapers, fancy magazines—whatever is well-written that you enjoy.)

Finally, if the options contain different verb tenses and one tense is in the future, re-read the sentence and look for clues that the event in question has not yet occurred. The clues are often slightly subtle.

I like the future tense summary on this site, here.

These answers are good. Kudos.

The official answer is here.