Some museums believe they don't need marketing. They think people should appreciate their exhibits and, if they don't, it's because the publie is not very sophisticated. During the pandemic, many museums closed while others tried to put exhibits online using Zoom. Some museums offered live$-$streamed concerts to expand their membership base through marketing. It can be said that marketing has helped some museums

a$.$ communicate effectively with the manufacturer

b$.$ minimize brand equity

c$.$ stay competitive

d$.$ use aggressive sales techniques