Great Britain Ended Up with a Gold Standard in the Early

Great Britain ended up with a gold standard in the early nineteenth century because:

A) as master of the British mint, Sir Isaac Newton priced silver much higher relative to gold than the two precious metals were priced in other European countries.
B) certain political groups in Parliament wanted a very expansionary monetary policy.
C) parliament sought to limit the government's ability to print money.
D) most other major economies had already adopted the gold standard.