Explanation

The students will have only a few minutes to prepare, so you need a word for the first blank that means improvised. Spurious means inauthentic, and can be eliminated. Contentious means tending to argue and does not address the lack of time to prepare, so eliminate this choice. Extemporaneous means with little or no preparation and is the best fit and correct answer.

For the second blank, you need a word that means effectively on topic because their remarks have to be effective though they might know very little about the topic. Sanctimonious means showing moral superiority and seditious means inciting a rebellion, so eliminate these choices. Germane means relevant, and is the best fit for the second blank.

Hence options B and E are correct