Which of the following could be the cause of an adverse sales volume variance for a company that sells summer products?

i. The company offers discounts on sales prices in order to maintain business.

ii. Poor weather leads to a reduction in sales.

iii. A strike in the factory causes a shortage of finished goods.

(i), (ii) and (iii) only

(i) and (ii) only

(ii) and (iii) only

(i) and (iii) only