Answer:
The correct answer is C) "elastic, and the price elasticity of supply is 1.74"
Explanation:
Formula: 
( (Qf - Qi) ÷ ((Qf + Qi) ÷ 2) )             ÷             ( (Pf - Pi) ÷ ((Pf + Pi) ÷ 2) )
        Quantity                                                                 Price
Lets remplace: 
Qi = Initial Quantity = 125 boxes
Qf = Final Quantity = 145 boxes
Pi = Initial Price = $2.25
Pf=  Final Price = $2.45
Quantity                                                                   Price
(145 - 125) ÷ ((145 + 125) ÷ 2)      ÷     (2.45-2.25) ÷ ((2.45+2.25)÷ 2)
= (20) ÷ (270÷ 2)                                           = (0.2) ÷  (4.7 ÷ 2)
= 20 ÷  135                                                    = 0.2 ÷ 2.35
= 0.148                                                           = 0.085
Finally:  we divide the result of quantity into the result of price 
= 0.148 ÷ 0.085
= 1.74
To classify into elastic or inelastic: 
When Pes > 1, then supply is price elastic
When Pes < 1, then supply is price inelastic
When Pes = 0, supply is perfectly inelastic
Answer:  <em>Elastic, and the price elasticity of supply is 1.74</em>