Answer:
C. The length of the presentation and D. The authority of the quoted experts
Explanation:
The answer for your question is actually D because when talking about context its best you have quoted experts but in general I would say both.
For your question though so you don't get confused on which answers it is its
This is imposople to answer there is no photo
Abstract nouns are essentially nouns that can be interpreted differently by different individuals, such as beauty or maturity. Going by this definition, the abstract noun in the given sentence should be "loyalty".