In each of the questions below are given three statements followed by three conclusions numbered I, II, and III. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follow(s) from the given statements disregarding commonly known facts. Statements: Some tables are chairs. All chairs are benches. All benches are desks. Conclusions: I. Some desks are tables. II. Some benches are tables. III. Some desks are chairs.
In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement is needed, select "no improvement".
From the early 1990s, salaries shot up and stock options (were introduced).