Consider the Following to Answer the Question(s) Below

Multiple Choice

Consider the following to answer the question(s) below:
EU (European Union) countries report that 46% of their labour force is female. The United Nations wants to determine if the percentage of females in the Canadian labour force is the same. Representatives from Statistics Canada plan to check a random sample of over 10,000 employment records on file to estimate the percentage of females in the Canadian labour force.
-If Statistics Canada wishes to tighten its interval, they should

A) increase the confidence level
B) increase the sample size
C) decrease the sample size
D) both A and B
E) both A and C