Nigeria has introduced variety of programs
for assisting students, which include free travel in public transport, financial allowances for higher education, and they subsidize public schools and colleges.
A. for assisting students, which include free travel in public transport, financial allowances for higher education, and they subsidize
B. for the assistance of students, to include free travel in public transport, also financial allowances for higher education, and subsidizing
Introduce to is the correct idiom.
C. in order to assist students, to include free travel in public transport, financial allowances for higher education, and to subsidize
D. to assist students, which includes free travel in public transport, financial allowances for higher education, and they also subsidize
E. to assist students, including free travel in public transport, financial allowances for higher education, and subsidized
"Introduce to" is the correct idiom. (A) and (B) are out. In (C), "in order" is uncessesary.
Check for parallelism: to assist [...] and subsidized. ("and they (also)" ) in (A) and (D) is incorrect.