Answer:
D. Clostridium does not have enzymes to process toxic oxygen
Explanation:
Obligate anaerobes are microorganisms killed by normal atmospheric concentrations of oxygen (20.95% O2). Oxygen tolerance varies between species, some capable of surviving in up to 8% oxygen, others losing viability unless the oxygen concentration is less than 0.5%. in other words, Obligate anaerobes are organism which can only live in environments which lack oxygen. Unlike the majority of organisms in the world, these organisms are poisoned by oxygen.
Therefore clostridium do not have enzymes to process this oxygen which is toxic for it
The moon pull back the waves so the sun can push them in the morning
There is no correct answer here it depends on your body and how fast your motabolism is.
The answer is: Use right / the right to use
Use right could only exist if a person who own a certain property or resources willingly (without any threat) give permission to other people to use that property/resources.
In business environment, this type of rights mostly given for artistic products. For example, in order to input a music that you didn't create on your you tube video, you need to obtain the use right from the artist who created the music.