What is a major difference between the Roman Catholic Church and the Eastern Orthodox Church? O A.
Roman Catholic churches perform a mass, but Eastern Orthodox churches don't.
OB.
The patriarch heads Roman Catholic churches, but the pope heads Eastern Orthodox churches,
C.
Roman Catholics don't follow the New Testament, but Eastern Orthodox followers do.
OD.
Roman Catholic priests cannot marry, but Eastern Orthodox priests can.

A.  Roman Catholic churches perform a mass, but Eastern Orthodox churches don't.

Explanation:

There are many differences between the Roman Catholic and Eastern Orthodox church, and one of them is that Catholic churches perform a mass, while Orthodox churches do not. They perform liturgies instead of masses.

The rest of the options are incorrect, because:

c. legislation should seek to resolve social problems.

option d is correct. corroborated sources of historical evidence   is necessary to validate a claim about an event in history.

historians tend to use written sources, but audio and visual materials as well as artifacts are important objects that supply information to modern historians.

historical sources are usually divided into two categories: primary and secondary sources. depending on the historian's intent, some sources shift their designation. determining what type of sources toimplement, and the level of credibility and reliability of those sources, is a significant step in critical thinking for the historian.

explanation: