According to the passage, the editors of Nightingale's letters credit her with contributing to which of the following?

The passage is primarily concerned with evaluating

Which of the following is an assumption underlying the last sentence of the passage?

The passage suggests that which of the following is a prediction concerning meteor streams that can be derived from both the conventional theories mentioned in the highlighted text and the new computer derived theory?

According to the passage, why do the dust particles in a meteor stream eventually surround a comet's original orbit?

It can be inferred from the passage that which of the following would most probably be observed during the Earth's passage through a meteor stream if the conventional theories mentioned in the highlighted text were correct?

The author states that the research described in the first paragraph was undertaken in order to

The author lists the various activities of early chartered trading companies in order to

It can be inferred from the passage that the author would characterize the activities engaged in by early chartered trading companies as being

A difference in which of the following would be an example of inequality in transaction costs as alluded to in the highlighted text?