Question: But President Nasser had not closed the canal only nationalized it
--
Answer: But President Nasser had not closed the canal, only nationalized it.

Question: They used circus exaggeration or covert attacks using slander and falsehoods on persons reputations
--
Answer: They used circus exaggeration or covert attacks using slander and falsehoods on persons' reputations.

Question: There are many possibilities of who may have built it but just for a moment of time consider the following
--
Answer: There are many possibilities of who may have built it, but just for a moment of time consider the following:

Question: Good clustering of data suggests minimal variation between samples
--
Answer:
Good clustering of data suggests minimal variation between samples.