<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A scientist in Boston is studying a new blood test to detect Ab to the parainfluenza virus with increased sensitivity and specificity. So far, her best attempt at creating such an exam reached 82 sensitivity and 88 specificity. She is hoping to increase these numbers by at least 2 percent for each value. After several years of work, she believes that she has actually managed to reach a sensitivity and specificity even greater than what she had originally hoped for. She travels to South America to begin testing her newest blood test. She finds 2,000 patients who are willing to participate in her study. Of the 2,000 patients, 1,200 of them are known to be infected with the parainfluenza virus. The scientist tests these 1,200 patients blood and finds that only 120 of them tested negative with her new test. Of the following options, which describes the sensitivity of the test?? A: 82, B: 84, C: 86, D: 90, E: 98,  <response>: This is a question about calculating the sensitivity of a medical test. The sensitivity refers to the ability of the test to correctly identify patients who have the disease. The question provides background information that the scientist was originally hoping to improve the sensitivity from 82 to at least 84. In the study, there were 1,200 patients known to be infected with parainfluenza virus. Of these 1,200 infected patients, the new test correctly identified 1,200 - 120 1,080 patients as positive. To calculate sensitivity, we take the number of true positives 1,080 divided by the total number of infected patients 1,200. This comes out to 1,0801,200 90.D: 90 