Q--Could Edward Snowden join MENSA?
A--My step-by-step reasoning: Snowden scored above 145 on two separate IQ tests. The minimum accepted IQ score for MENSA on the Stanford–Binet is 132, while for the Cattell it is 148.
So, the answer is yes.

Q--Would Benito Mussolini hypothetically play well in the NBA?
A--My step-by-step reasoning: Height is an important factor in playing basketball at a high level. The average NBA player is 6 feet 7 inches tall. Benito Mussolini was 5 feet 6.5 inches tall.
So, the answer is no.

Q--Did Elizabeth I of England own any viscose fiber?
A--My step-by-step reasoning: Viscose is a rayon fiber invented in 1892. Elizabeth I of England died in the 1600s.
So, the answer is no.

Q--Does welding with acetylene simulate the temperature of a star?
A--
My step-by-step reasoning: Acetylene is used for oxyacetylene welding. An acetylene/oxygen flame burns at about 3,773 K. The star Betelgeuse has a surface temperature of 3,500 K.
So, the answer is yes.