"although a preliminary hazard-zone map for ruiz, completed one month before the november 1985 eruption, clearly delineated armero as being especially vulnerable to mudflows, emergency-response measures taken during the eruption were entirely inadequate to save the more than 23,000 lives lost when the mudflows struck."

what is the best meaning of vulnerable as it is used in the sentence

a) weak
b) open to
c) exposed
d) in danger of

Which words in this excerpt from the count of monte cristo can be used as synonyms to determine the meaning of the word grotto? dant? s entered the second grotto. the second grotto was lower and more gloomy than the first; the air that could only enter by the newly formed opening had the mephitic smell dant? s was surprised not to find in the outer cavern. he waited in order to allow pure air to displace the foul atmosphere, and then went on. 1. air 2. opening 3. mephitic 4. cavern 5. pure 6. atmosphere