If Our Solar System Hadn't Formed with a Jupiter-Sized Planet

Multiple Choice

If our solar system hadn't formed with a Jupiter-sized planet,

A) the Sun would have been more massive, with a lifetime too short for life to evolve
B) the Earth would have never formed
C) the rate of impacts on the Earth may have been much higher, possibly preventing the appearance of life
D) the rate of impacts on the Earth may have been much lower, enabling the appearance of life much earlier