The net resistance of a voltmeter should be large to ensure that

Question

$\begin {array} {1 1} (A)\;It \: does\: not\: get\: overheated \\ (B)\;It\: draws\: sufficient\: current \: from\: the \: circuit\: necessary \: for\: its \: functioning \\ (C)\;It\: can\: measure\: large\: potential\: differences \\ (D)\;It \: does\: not \: appreciably\: change\: the \: potential\: difference\: to\: be \: measured \end {array}$