Even though the costs of paying baseball players amounts to a sum greater
than one half of overall cost of operating a Major League Baseball team last year, Major League Baseball franchise owners were still willing to pay increasingly higher salaries to top players.
A. amounts to a sum greater
B. amounts to more
C. amounted to more
D. amounted to a greater sum
E. amounted to greater
A - Incorrect - Costs is plural, and "amounts to" is singular. Also, "greater" should be used with countable quantities
B - Incorrect - Costs is plural, and "amounts to" is singular.