问题
单项选择题
Which of the following statements regarding margin accounts is TRUE()
A. A margin call is issued only on short positions.
B. Margin accounts can be used to purchase securities by borrowing part of the purchase price.
C. Margin refers to the amount of funds the investor can borrow.
答案
参考答案：B
解析：
Margin accounts are brokerage accounts that allow investors to borrow part of the purchase price from the broker.