Blossom's Flowers Purchases Roses for Sale for Valentine's Day

Blossom's Flowers purchases roses for sale for Valentine's Day. The roses are purchased for $10 a dozen and are sold for $20 a dozen. Any roses not sold on Valentine's Day can be sold for $5 per
Dozen. The owner will purchase 1 of 3 amounts of roses for Valentine's Day: 100, 200, or 400 dozen
Roses. Given 0.2, 0.4, and 0.4 are the probabilities for the sale of 100, 200, or 400 dozen roses,
Respectively, then the optimal EMV for buying roses is

A) $700
B) $900
C) $1,700
D) $1,900