If a total sample of 150 students is taken, determine the number of juniors and seniors under the optimum allocation scheme, assuming that the stratum population standard deviations are the same as the corresponding sample values

Which sentence is grammatically correct?

While conducting research using an electronic database called EBSCO, I found an article titled "Ergonomic Office Equipment and the Prevention of Work Injuries." While conducting research using an electronic database called EBSCO I found an article titled "Ergonomic Office Equipment and the Prevention of Work Injuries. While conducting research using an electronic database called EBSCO I found an article titled Ergonomic office equipment and the prevention of work injuries."

When an agency is required to disclose a document but blacks out or otherwise

conceals exempted information, the information is said to be: a. redacted b. revoked c. rescinded d. repealed