Which of the Following Is True of the Prime Meridian

Multiple Choice

Which of the following is true of the prime meridian just prior to the year 1884?

A) all countries were already using the Greenwich meridian for their land maps.
B) most countries were already using the Greenwich meridian for their marine maps.
C) the United States used the Washington meridian for land maps and marine maps.
D) there was no such thing as a prime meridian before 1884.
E) Canada used the Ottawa meridian for land maps and marine maps.