Which house most likely flooded as a result of the storm ?
a. y only
b. x and z
c. x only
d. y and z

D. look at table 1 and look at the water level then look at table 2 and it's pretty easy from there.

D. Y and Z

Explanation:

From the data given, one can easily see that the maximum elevation achieved by river is  5.2 meters. Now the house Y has the elevation of 3.5 meter and house Z has elevation of 4 meters. Around 1:00 PM, when the flood level reaches at 4.0 meters, both Y and Z houses will be flooded badly. Since, House X has an elevation of 8 meters so it is completely safe. So option b and c are excluded.

Since, elevation of river would be higher than both Y and Z, so option a is also excluded and option d is the right answer.

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."

a. 35°c

b. 25°c

c. 10°c

d. 40°c