Suppose A $1.0-\mathrm{kg}$ Object Traveling Rightward At $1.0 \mathrm{~m} / \mathrm{s}$ Hits A

Suppose a $1.0-\mathrm{kg}$ object traveling rightward at $1.0 \mathrm{~m} / \mathrm{s}$ hits a $3.0 \mathrm{~kg}$ object at rest. Afterward, we observe the lighter object to move leftward with a speed of $0.75 \mathrm{~m} / \mathrm{s}$ . What impulse did the collision interaction give the smaller object at the expense of the larger?

A) None; the larger object was at rest and so had no momentum to give the smaller object.
B) None; the smaller object gave an impulse to larger, not the other way around.
C) $0.75 \mathrm{~kg} \cdot \mathrm{m} / \mathrm{s}$ leftward.
D) $1.0 \mathrm{~kg} \cdot \mathrm{m} / \mathrm{s}$ leftward.
E) $1.75 \mathrm{~kg} \cdot \mathrm{m} / \mathrm{s}$ leftward.