Leroy is writing an article for the school paper entitled "Health Hazards of Excessive Computer Use." Which of these opening lines
should he use if he wants to convey the most precise meaning?
A. According to three recent medical studies daily computer use of more than 6 consecutive hours can reduce one's visual
acuity by as much as 20%
B.
Recent research puts forth the idea that sitting in front of the computer for long periods can have detrimental effects on
one's health
C.
A number of studies have made a connection between using the computer too much and not being able to focus the
eyes clearly
D.
Experts recently claimed that excessive use of the computer without a break can really do damage to one's ability to see
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A: According to three recent medical studies, daily computer use of more than 6 consecutive hours can reduce one's visual acuity by as much as 20%.

Explanation:

Since Leroy's article is on health hazards of excessive computer use, his first line should be as specific as possible about those hazards. The correct answer specifically says "more than 6 consecutive hours" of computer use can reduce vision by up to "20%." Concrete facts give weight to Leroy's words and convey his meaning more clearly.

the sentence does not violate the phrase structure second rule (introduced by noam chomsky) because noun phrases consist of a determiner such as a, the or every, and a noun. in the sentence, the noun phrase the cake includes a determiner (the) and a noun (cake).

on the other hand, the first rule indicates that a sentence encloses a noun phrase, followed by a verb phrase. the example sentence can be analysed as follows:

john (n) + ate (v) + the (det) + cake (n).