Question 1160506
The volume of the jar is the product of its dimensions, so is 

  {{{V=LWH= (7cm)(7cm)(6.5cm) = 318.5cm^3}}}


the actual volume of a single M&M candy to be about {{{0.636}}} cubic milliliters
{{{1cm^3 = 1mL}}}=> the volume is {{{0.636cm^3}}}

divide the volume of the jar by the volume of a single M&M to get the number of the M&M`s in the jar 


then {{{318.5/0.636=500.78616352201254}}}» {{{500}}} M&M in full jar


so, for the most reasonable LOWER LIMIT for the number of M&M`s in the jar the correct answer should be {{{B}}}