Near the historic monument, there is a bridge . . . . . . . . the Thames River. A. above B. over C. off D. towards

The correct answer is B. over.

The other options are incorrect because:

• A. above is not a correct preposition to use with the word “bridge”. A bridge is not something that is “above” something else.
• C. off is not a correct preposition to use with the word “bridge”. A bridge is not something that is “off” something else.
• D. towards is not a correct preposition to use with the word “bridge”. A bridge is not something that is “towards” something else.

The word “over” is a correct preposition to use with the word “bridge” because a bridge is something that goes over something else, such as a river.