You run a website called Offhand that sells exclusive handmade home decor items. On Mother's Day, the website unexpectedly receives a burst of traffic following the marketing campaign designed for this occasion. Thankfully, you are equipped with a good cloud service model and hence you are able to increase the cloud resources the website needs without disrupting your web services. Which of the following cloud characteristics helped you manage the situation easily?

a$.$ Resource pooling

b$.$ Rapid elasticity

c$.$ Measured service

d$.$ Broad network access