Although prices have risen a bit in recent years, the cost of a ski vacation to some of these eastern european resorts is:
a. estimated to be less than half the cost at a resort like vail or park city in the united states. b. cheaper than the cost of a european ski or snowboard vacationc. both a and bd. neither a nor b

A. estimated to be less than half the cost at a resort like Vail or Park City in the United States.

Explanation:

cirrus clouds: lacy or wispy clouds that form at high altitudes it would generally happen before a change in the weather.

the roman republic began to expand when rome fought the punic wars and defeated carthage. the punic wars refer to the series of 3 wars fought among rome and carthage, before it ended in carthage's defeat.