The correct option is B.
An appositive phrase refers to a noun or a pronoun that identifies or rename another noun or pronoun; it gives more information about that noun or pronoun. An appositive together with its modifier is called an appositive phrase. An appositive phrase is said to be non- essential when it adds information to a sentence whose meaning is already clear. Non-essential appositives are usually set off by a coma.
It should be:
1. The fans...in ten buses
4. The pitcher made two great catches
5. Another player made two good tosses to first base
Artist Frida Kahlo was considered one of Mexico's greatest artists who began painting mostly self-portraits after she was severely injured in a bus accident. Kahlo later became politically active and married fellow communist artist Diego Rivera in 1929.
