Sheltered english instruction is more appropriate for students who are:
a. field independent and have a strong foundation in l1.
b. at the intermediate or advanced-levels of english proficiency.
c. native speakers of a language other than spanish.
d. already literate in their native language.

B

Explanation:

at the intermediate or advanced-levels of English proficiency.

the boy's acceleration toward the girl is 2.08 m/s^2.

explanation:

according the newton's third law, the force causing the girl accelerate towards the boy will be me with equal counter-force causing the boy to accelerate towards the girl. these forces will be of equal magnitude and allows us to determine the boy's acceleration:

the boy's acceleration toward the girl is 2.08 m/s^2.