Scientists have many theories about how the universe _______ into being.

A. would come      B. was coming      C. had come          D. came

Scientists have many theories about how the universe ___ into being.

A. came                                     B. was coming

C. had come                               D. would come

Scientists have many theories about how the universe ___ into being.

A. came      B. was coming

C. had come   D. would come

Scientists have many theories about how the universe ___ into being.

A. came      B. was coming

C. had come   D. would come

Scientists have many theories about how the universe ___ into being.

A. came        B. was coming       C. had come   D. would come