Identify the true statement. choose one:
a. time zones are set in relation to the time at the astronomical observatory in greenwich, england.
b. time zones are 15° of latitude wide.
c. denver (latitude 40°n, longitude 105°w) is 10 time zones away from greenwich, england (latitude 51°n, longitude 0°).
d. the second (as a unit of time) is defined in terms of energy changes within the chromium atom.

A. Time zones are set in relation to the time at the astronomical observatory in Greenwich, England.

Explanation:

Time zones around the world are set and divided on the basis of the line that is drawn along the prime, meridians and this marks the division of the two-sphere as western and eastern longitudes. Thus the place on the Greenwich England is said to be taken as the prime meridian as the basis of astronomical observations It is observed as the zero degrees meridian as GMT. Is a 5.5 mile in relation to the mean solar time. As most of this zone are considered as ahead and after GMT.

Answer decreased soil salinity;