Astudent is asked to conduct a search on climate change and the contribution of greenhouse gases. the student, however, would like to avoid results that explain how a greenhouse works. which boolean search would return the most useful results?
a. using not before a keyword: greenhouse not gases
b. using or between two key words: greenhouse or gases
c. using quotation marks around the single word "greenhouse"
d. using and between the search terms: greenhouse and gases

Read the sentences. the lowest point in antarctica appears to be the bentley subglacial trench, which is 8,200 feet below sea level. lower points may exist. which choice correctly uses the subordinating conjunction “although” to combine the sentences? the lowest point in antarctica appears to be the bentley subglacial trench, which is 8,200 feet below sea level, although lower points may exist. the lowest point in antarctica appears to be the bentley subglacial trench, which is 8,200 feet below sea level. although lower points may exist. the lowest point in antarctica appears to be the bentley subglacial trench, which is 8,200 feet below sea level although, lower points may exist. the lowest point in antarctica appears to be the bentley subglacial trench, which is 8,200 feet below sea level; although lower points may exist.