De Soto is believed to have transmitted disease rampantly through the indigenous groups he encountered. What do scientists believe to be the primary agent of contagion?
a. the men themselves
b. the explorers' dogs
c. the explorers' pigs
d. the explorers' horses
Question 2
Which of the following is not a signal?
a. Coughs from cold
b. Winking from pleasure
c. Screams from fear
d. Crying from sadness
e. Sneezing from sickness