Refer to the Scenario Below to Answer the Following Questions

Refer to the scenario below to answer the following questions.
Fun- Spot Fun Park began as a small amusement park in 1985.With nothing more than a merry- go- round,a slide,pony rides,and an ice cream stand,Fun- Spot grew into a popular family attraction with 20 rides,a restaurant,and an outdoor performing arts theater.
"My wife,Gail,and I didn't know what we were getting into," commented Ron Hart,the owner."We just knew that weekenders coming to the lakes in our rural area represented an untapped market."
Today,thousands of visitors flock to Fun- Spot: families,children of all ages,and even senior citizens who enjoy strolling through the gardens and arbor.
"There's something here for everyone," Gail Hart said with a smile."Dozens of companies hold annual company picnics here.We have welcomed class field trips.And we even had one wedding here at the park!"
"Here's the funny thing," Ron chimed in."We really don't know why we've been so successful.There is nothing else like Fun- Spot Fun Park in the area.We were just lucky."
"I think it's the ambience of the park that has brought so many visitors," Gail added."We provide a 'total package' of entertainment.Plus,we try to change our rides and various attractions from time to time for variety"
Ron and Gail Hart admitted that making every visitor happy is a priority."That has always been our philosophy," they said."Like it says on the entrance to the park,'We're here to make you happy!' And we've always been able to deliver on that because we've never allowed ourselves to grow too big too quickly."
-Gail and Ron strive to provide new offerings and entertainment options for their visitors.What type of strategy is this?

A) market development
B) diversification
C) product development
D) customer development
E) market penetration