Final answer:
The correct option is d. Selection length<100 AND studioName <> 'Fox'(Movies), which selects all movies under 100 minutes in length and not produced by 'Fox'.
Step-by-step explanation:
The student is asking how to express a query that would list all movies with a length of less than 100 minutes, excluding those produced by the studio 'Fox'. The correct answer to this question is d. Selection length<100 AND studioName <>'Fox'(Movies). This is because we want to ensure that we're selecting all movies that meet two criteria: the first is that the movie has a length of less than 100 minutes and the second is that it wasn't produced by 'Fox'. We use '<100' to specify that the length should be less than 100, and '<>' to indicate that the studio name should not be equal to 'Fox'.