Why Does Nagel Reject the Notion That People Only Fear

Why does Nagel reject the notion that people only fear death because they try and fail to imagine what it is like to be dead?

A) Nagel doesn't reject this notion
B) This suggests that death is a state, and death isn't a state
C) People also can't imagine what it is like to be unconscious but unconsciousness itself isn't scary
D) People can imagine what it is like to be dead