Why did the 1918 outbreak of the Spanish flu cause so many deaths? A. The influenza virus was a strain to which people had no immunity.
B. The World Health Organization had not yet been created.
C. The United Nations could not distribute vaccines fast enough.
D. The virus had combined with an even deadlier avian flu virus.

d

Explanation:

there had been a point where the soldiers had also developed pneumonia along WITH the Spanish flu resulting in ultimately more deaths then without.

the noble might have thought that the system was far because they had lot of things and riches and the serf would have thought that the feudal system was un fair because of the way they were treated.