In which one of the following cases, a contract becomes void on the ground of subsequent impossibility?

A agreed to supply certain quantity of Basmati rice to B in the month of December 2009. However, due to deficient monsoon rains in 2009, the prices of Basmati rice skyrocketed making it difficult for A to supply rice at the agreed price except at heavy losses

A agreed to supply B certain quantity of fabric at specified rate manufactured by AB Mills. However, due to indefinite workers' strike in the mill, A failed to supply the fabric to B

A contracts to act at a theatre for six months in consideration of a sum paid in advance by B. On several occasions A is too ill to act

A agreed to supply ten tons of sugar to B at a rate of Rs. 20 per kg. However, due to non-availability of adequate stock of sugar in the local market, A failed to supply sugar