Melati and Isabel started Bye Bye Plastic Bags by organizing beach cleanups and a petition. When these tactics didn’t work, they

A
filmed a video about their cause that went viral.
B
boycotted businesses that sold plastic bags.
C
decided to go on a hunger strike.
D
launched a popular hashtag.

To determine the correct answer, we need to examine each option and assess which one led to the success of Melati and Isabel's efforts in Bye Bye Plastic Bags.

A) Filming a video about their cause that went viral: This option suggests that Melati and Isabel created a video to raise awareness about their cause, which gained significant attention and support online. This could potentially mobilize more people to join their movement, making it a viable option.

B) Boycotting businesses that sold plastic bags: This option implies that Melati and Isabel decided to take direct action against businesses that continued to sell plastic bags, possibly hoping that the boycott would put pressure on these companies to change their practices. While boycotts can be effective, it's not explicitly mentioned in the passage that this specific tactic successfully led to their goal.

C) Deciding to go on a hunger strike: This option implies that Melati and Isabel resorted to extreme measures as a form of protest, by refusing to eat until their cause gained attention or changes were made. While hunger strikes can be powerful methods of protest, it is not mentioned in the passage that they resorted to this tactic.

D) Launching a popular hashtag: This option suggests that Melati and Isabel created a hashtag related to their cause and that it gained significant traction on social media platforms. Hashtags can be effective in spreading awareness and mobilizing support, so this is a plausible option.

Based on the information given, option A (filming a viral video about their cause) and option D (launching a popular hashtag) are the most likely options that led Melati and Isabel to their success in Bye Bye Plastic Bags. However, without further context or clarification, it is difficult to definitively determine the correct answer.