The answer is A. Most preschools will begin tolerating youngsters at around age 2 ½, yet that doesn't mean your tyke is mystically prepared for preschool when he achieves that age. Status for preschool has more to do with where your youngster is formative.
I believe the answer is: <span>Survey- allows data to be collected rapidly
In a survey, the researchers could throw out a huge amount of questionaires to a lot of people from different segmentations and could obtain personalized answers even without having to supervise the process, which allow them to collect the data more rapidly.</span>
They are both (phagocytes) and they engulf foreign materials in body.
