The greatest risk factor for bladder cancer is a. low fluid intake. b. recurrent bladder infections. c. smoking. d. family history of bladder cancer.

The correct answer is c. smoking

Explanation:

Cigarette contains tobacco and it is identified that cigarette smoke has up to 7000 chemicals out of which 250 are poisonous and 70 chemicals are found to be carcinogenic.  

Smoking is the main cause and greatest risk factor for bladder cancer. The person who smoke regularly are 3 times more prone to get bladder cancer than non-smokers. Smoking causes cancer in other organs and tissue like lungs, mouth, esophagus, throat, liver, pancreas, stomach, etc. Therefore the correct answer is c.

b

explanation:

the transfer of energy between two molecules spaced just nanometers apart plays a key role in many technologies, including photovoltaics, quantum information systems, lighting, and sensors, as well as in biophysics to measure nanometer distances and in photosynthesis. but an open question in this area is what effect, if any, the surrounding photonic environment has on this nanoscale energy transfer. by designing and performing a carefully controlled experiment to answer this question, scientists have settled the debate and found clues to improving the efficiency of many of the technologies that rely on this process.

explanation: