18. which are reasons that populations grew during the industrial revolution
1. the smallpox va...
18. which are reasons that populations grew during the industrial revolution
1. the smallpox vaccine prevented deaths
ii. improved farming techniques produced more food
iii. seatbelts were invented, preventing deaths
a. i, ii, and iit
b. i and ii only
c. ii and iii only
d. i and ill only
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