Likely Effects of the Cretaceous-Tertiary Boundary Impact Include All but Which

Likely effects of the Cretaceous-Tertiary boundary impact include all but which of the following?

A) a stratospheric dust cloud that lasted 3-6 months
B) massive fires from the heat of the blast and from molten material
C) oxides of nitrogen formed by the compressive shock wave,forming HNO₃ in the atmosphere
D) significant long-term cooling in the oceans but warming in continental areas
E) total extinction of all land animals with a body mass of more than about 10 kg