Why does dr. jekyll think that only the first batch of the drug usually worked?

Read the excerpt from “pakistan’s malala.” "the taliban have repeatedly targeted schools in swat," she wrote in an extraordinary blog when she was empowered to share her voice with the world by the bbc. she was writing around the time the taliban issued a formal edict in january 2009 banning all girls from schools. on the blog, she praised her father, who was operating one of the few schools that would go on to defy that order. "my father said that some days ago someone brought the printout of this diary saying how wonderful it was," malala wrote. "my father said that he smiled, but could not even say that it was written by his daughter." which excerpt best shows the relationship between the setting and malala’s father, ziauddin yousufzai? “"my father said that some days ago someone brought the printout of this diary. . ” “she was writing around the time the taliban issued a formal edict. . ” “[h]er father, who was operating one of the few schools that would go on to defy that order.” “[s]he was empowered to share her voice with the world by the bbc.”