Article: Innovation and Technology: A Panacea to Teaching and Learning Challenges during the Covid$-19$ Lockdown in South Africa$]$ According to the text, what is one of the challenges faced by students in managing their studies in a virtual learning environment? $($p$.74)$

a$.$

Lack of availability of online learning resources

b$.$

Insufficient workspace and quiet study locations at home

c$.$

Access to computers and internet connectivity

d$.$

Difficulty in understanding instructional goals in online courses