You visit a very large city that experiences frequent formations of heavy photochemical smog. in order to keep up your exercise routine, you intend to jog. in general, when would be the worst time to go running?
a. middle of the night, about 3-4 a. m.
b. late evening, about 10-11 p. m.
c. late afternoon
d. early in the morning, just as the sun comes up