While we are told that the suddenly shift from gas to liquid is bad for current pumps, we need to consider why it is bad. The passage tells us that it is problematic because it leads to loss of reassure and the pump is no longer able to transport the crude (see lines 25-30).
This does not seem to match E, which says that the transition is problematic because it will explode. The earlier mention of explosion is not related to loss of pressure. It relates to processing crude, not pumping it.
