If we are solving an enthymeme and the conclusion is an I proposition, then according to the modern view of existential import, the premises:

A) can be any propositions
B) must be an I proposition and an A proposition
C) must both be A propositions
D) must both be I propositions
E) must be an I proposition and an O proposition

In the context of syllogistic logic, when solving an enthymeme with a conclusion that is an I proposition (which asserts partial existence, "Some S are P"), according to the modern view of existential import, the premises must logically support the conclusion's claim of existence. Therefore, one premise typically affirms existence (an A proposition, "All S are P", implies existence in the modern view) and the other premise (an I proposition, "Some S are P") directly supports the conclusion's claim. This combination ensures that the conclusion's existential claim is adequately grounded in the premises.