Sentence Correction

Although at the game, the batting coach, conceded the new lineup, in which the player's strengths were better utilized, the coach said that in the future, they must agreed upon by all the coaches before being put into practice

A same
B Conceded the new lineup,in which the player's strengths were better utilized,the coach said that future lineups would require the consent of all the coaches before putting them into practice.
C agreed to the lineup,in which the player's strengths were better utilized,the coach said that future lineups must be agreed upon by all the coaches before being put into practice.
D agreed to the lineup,in which the player's strengths were better utilized,the coach said that in the future, they must agreed upon by all the coaches before the have been put into practice.
E agreed on the new lineup's utilisation of player's strengths , the coach said that in the future the lineups must be agreed upon by all the coaches before they have been put into use.

Proclaimed Ans: C.

I could only eliminate A and D (SV agreement problem). Would someone please explain what is wrong with the other options.

Thanks
Teja

{A} - "They" has no antecedent; INCORRECT
{B} - "them" ambiguity; INCORRECT
{C} - KEEP
{D} - "they" has no antecedent; INCORRECT
{E} - agreement was on lineup and not on strength; INCORRECT

So, {C}

However, i think there is some issue in the question. There seems to be an extra comma, which should not be there. Solving this question by excluding this comma.