You are correct. 'Greater' become relevant only when a numeral is prevalent. Since no numbers have been indicated, use of greater is dictionally wrong. Drop A, D, and E.
Between B and C, use of present tense in B is wrong.
Coming to 'more' we can use more in two instances. 1. We describe a higher volume that is taken a single mass, and then we can use more/less. Here there is no question of counting the volume as one, two, and three.etc.
Example: There is more violence among boys than among
...
Between B and C, use of present tense in B is wrong.
Coming to 'more' we can use more in two instances. 1. We describe a higher volume that is taken a single mass, and then we can use more/less. Here there is no question of counting the volume as one, two, and three.etc.
Example: There is more violence among boys than among
...

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