Answer:
A: A new blood test makes it easier-and safer-to detect concussions.
Explanation:
The main idea of the passage is A new blood test makes it easier—and safer—to detect concussions.
Notice the phrases question the use of and proposed an alternative way. They suggest that the main idea involves a possible solution to a problem. Here, the main idea is that the problem of detecting concussions without radiation could be solved by a simple blood test.
An online article about the evolution of bicycles.
Delivering a speech in a conversational style from a well-developed and researched outline is termed as <u>extemporaneous speaking.</u>
Extemporaneous speaking refers to the delivery of a carefully prepared speech that has been perfected, spoken informally while using brief notes. And a speaker who reads from a prepared manuscript can be effective when speaking extemporaneously.
Extemporaneous speeches are not read or memorized, so the speaker must be able to "think on their feet," which can be stressful but also foster a high degree of spontaneity and produce a natural, conversational style.
Extemporaneous speeches are more spontaneous because they are almost entirely created in the moment. However, because they demand extensive planning and research, they typically have much greater depth and are therefore typically the preferred approach.
Find more on extemporaneous speaking at : brainly.com/question/15705863
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