Could you explain why the answer is B 2010 and 2013 is significantly different? Detailed explanation is much appreciated

The prevalence of Newcastle disease in poultry in Selangor in 2010 is 5% (95%CI 2.7 - 7.2%) and in 2013 is 7% (95% CI = 5.9-8.4). The prevalence of ND in Peninsular Malaysia in 2010 is 2% (95% CI 1.5-2.0). The prevalence of ND in Selangor for: Select one: O a. 2010 and 2013 is not significantly different. b. 2010 and 2013 is significantly different. O c. 2010 is similar to the rest of Peninsular Malaysia. O d. 2010 is low