Object a Strikes the Stationary Object B Head-On in an Elastic

Multiple Choice

Object A strikes the stationary object B head-on in an elastic collision. The mass of A is fixed, you may choose the mass of B appropriately. Then:

A) for B to have the greatest recoil speed, choose m_A = m_B
B) for B to have the greatest recoil momentum, choose m_B << m_A
C) for B to have the greatest recoil kinetic energy, choose m_B >> m_A
D) for B to have the least recoil speed, choose m_B = m_A
E) for B to have the greatest recoil kinetic energy, choose m_B = m_A