Which of the following may be the probable title for the passage

A．Since 1866, use of the metric system in the U.S. has been increasing.
B．Since 1988, the metric system has been the preferred system of weights and measures for U.S. trade and life.
C．In 1988, Congress passed a law to prevent the use of the Customary System in trade and commerce.
D．On Dec. 23, 1975, Pres. Gerald R. Ford signed the Metric Conversion Act of 1975 to adopt the metric system in the U. S.

A．The Customary System originated from the British Imperial System.
B．The Customary System has just been used in daily time.
C．The metric system was specifically sanctioned by Congress in 1866.
D．From 1964, using the units of the International System has been the policy of the National Bureau of Standards.