The following visualizations are an example of what type of storyboard creation method?

An illustration shows five sticky notes. Text in the first sticky note reads, $?$Introduce problem setting: Residential customer service ratings below industry standards.? Text in the second sticky note reads, $?$Introduce protagonist Liann: Home internet outage. Working mom with kids.? Text in third sticky note reads, $?$Liann calls customer service: Waits on hold $12\mathrm{.}4$ minutes. No knowledge of other calls.? Text in the fourth note reads, $?$C S R Answers: Little info on outage. Average time talking to customer equals $8\mathrm{.}9$ minutes.? Text in the fifth sticky note reads, $?$Liann calls back twice: Internet outage equals $14$ hours. Not notified when service restored.?

a$.$

PowerPoint

b$.$

Low$-$tech

c$.$

None of these choices

d$.$

High$-$tech