Which of the following statements are true? Check all that apply. a. A voltmeter

Which of the following statements are true?
Check all that apply.
a. A voltmeter is used to measure voltage.
b. A voltmeter has a small internal resistance.
c. A voltmeter must be placed in parallel with a resistor to measure the voltage across the resistor.
d. An ammeter must be placed in parallel with a resistor to measure the current through the resistor.
e. An ammeter is used to measure current.
f. An ammeter has a large internal resistance.