Western Investments holds a fixed-income portfolio comprised of four bonds whose market values and durations are given in the following table.(Click on the icon located on the top-right corner of the data table below in order to copy its contents into a spreadsheet.)

	Bond A	Bond B	Bond C	Bond D
Market Value	$200,000	$300,000	$250,000	$550,000
Duration	4	6	7	8

The portfolio's duration is closest to:

(Select the best answer below.)

A.

6.06

B.

6.73

C.

6.25