Using an Agfa Digital Imaging System, If an Image's Exposure

Using an Agfa digital imaging system, if an image's exposure indicator is 2.3 lgM while the optimal range begins at 2.6 lgM, this means that the IR was ______________ and the exposure to the IR needs to be ___________________ .

A) Underexposed; increased by 30%
B) Underexposed; increased by a factor of two
C) Overexposed; decreased by 30%
D) Overexposed; decreased by a factor of two