<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 1-year-old immigrant girl has not received any recommended vaccines since birth. She attends daycare and remains healthy despite her daily association with several other children for the past 3 months at a home day-care facility. Which of the following phenomena explains why she has not contracted any vaccine-preventable diseases such as measles, diphtheria, or pertussis?? A: Genetic drift, B: Genetic shift, C: Tolerance, D: Immune evasion, E: Herd immunity,  <response>: This question is asking about why a 1-year-old unvaccinated girl has not contracted any vaccine-preventable diseases, despite being in close contact with other children at daycare. The answer likely relates to herd immunity. Genetic drift and genetic shift refer to changes in pathogens over time, not protection against infection. Tolerance refers to reduced immune responsiveness to avoid damage, which does not explain lack of infection. Immune evasion refers to pathogens actively evading the immune system, which also does not explain lack of infection. Herd immunity refers to protection from infection when a high percentage of the population is immune, which best explains why this unvaccinated child has not become infected despite exposure.E: Herd immunity 