It on be inferred from the passage that kerosene was preferable to whale oil because whale oil was too ______.

A．On the cliffs of an island.
B．In the eaves of an island.
C．Under the holy picture of the Virgin.
D．In the Virgin convent of an island.

A．Every year thousands of snakes commit suicide after August 15.
B．People can find special marks on the heads of these sacred snakes.
C．The yearly visit of these snakes is relevant to the local religion.
D．People can touch these snakes without being hurt.