School A is planning to expand a new building for their classes. There are two sections for each class already but they want extra rooms so that new students can enroll for the courses.

Which of the following statement weaken the above decision? 

A) By building new rooms, area of school playground will be decreased. 

B) There is another school in the area where students are taking admission.

C) Many students wanted to take admission in this school last year but could not have taken due to less seating capacity.

D) Parents of the students already complaining about the less attention towards their children.

We take a look at the given statements as follows:

A) By building new rooms, area of school playground will be decreased. → The presence of playgrounds is an important aspect of schools and the parents as well. Decreasing it might lower the appeal of admission for new students. Hence, this statement weakens the decision. 

B) There is another school in the area where students are taking admission. → If there are more seats in the school, then interested students will not have to take admission in another school. Hence, this statement doesn't weaken the decision. 

C) Many students wanted to take admission in this school last year but could not have taken due to less seating capacity. → This strengthens the decision as those interested students can now take admission due to increased seats. Hence, this statement doesn't weaken the decision. 

D) Parents of the students already complaining about the less attention towards their children. → The more the number of students, the lesser will be the individual attention towards students. Hence, this statement weakens the decision. 

Therefore, only statements A and D weaken the decision.

Hence, only statements A and D weaken the decision.