Question 11: After conducting research, does your conclusion need revision? Why? Support your revision with evidence from literature.
I

Yes , after conducting research,  conclusion need revision

Explanation:

Yes , after conducting research,  conclusion need revision. After the research is conducted the results are discussed with the peers to get their affirmation on the same and in case if they feel that there are some issues with the result obtained in practical sense, they ask the researcher to confirm his/her experiment once again and in lieu to revision there are chances that the results need to be revised once again.

"d.) carbon dioxide and hydrogen sulfide"

i believe your answer would be c.. : )