Which choice displays a verb tense shift where past perfect tense awkwardly shifts to present tense? a) i knew what they were doing. eliminate b) i had known what they are doing. c) i knew what they have been doing. d) i have known what they have been doing

Asentence teacher gives the following speech. prepare a brief speech to accompany your science project. the speech will be presented to a faculty panel selected as judges. include a summary of your hypothesis, methods, and results. provide an explanation of any pictures or charts one of your poster. also share any complications you encountered during the science fair process. who is the intended audience for the teachers speech? a. young students. b. peers at the science fair. c. teacher evaluators. d. science professionals