Read the following article and answer the question. Article: Israel was happy, very happy. The news of a deal to bring home the kidnapped soldier Gilad Shalit , a young man held prisoner by Hamas for five years,spread. But the happiness was hardened by the reality of the price Israelis had paid to set him free. The 1,027 Palestinian prisoners to be exchanged for the single Israeli corporal turned out to include men and women convicted of some of the worst terrorist attacks in the country. "Ambivalent," says Aya Ilouz, of her feelings on the matter. Strolling in downtown Jerusalem with her husband Liron and their 5-month-old daughter Yael, the couple is so in sync on the question of the day that they finish each other's thoughts. "Yes," says Liron, "we are very happy and excited to see Gilad meet his family. And on the other hand--" "We are very concerned," says Aya. "About what happens next," Liron explains. "When the next terrorist blows himself up, someone will have to answer." Just around the corner, on King George Street, Alan Bauer had been walking home with his son on March 21, 2002, when a Palestinian man named Mohammad Hashaika exploded a suicide vest packed with metal scraps. Eighty-four people were wounded that day. Of the three killed, one was a woman pregnant with twins. Though the bomber of course died, Israeli courts convicted the two women who drove him to the site of the bombing, easing his way past the Israeli checkpoint by buying flowers to carry in the Mother's Day crowd. "These women, as I speak, are being released," Bauer says. Specifics have a way of weakening the joy of Shalit's release. Among the 477 prisoners released on Tuesday, in the first phase of the exchange, are an organizer of the 2002 Passover bombing that killed 30 people; a woman who developed an online relationship with a lovesick Israeli youth she then had murdered when he came to meet her; and the man who proudly displayed his bloody hands to the mob gathered outside the Ramallah building where two Israeli soldiers were beaten to death after making a wrong turn on Oct. 12,... Question: What's the main idea of the passage? Answer:

Pick your answer from:
a). Israeli people's attitudes to the prisoner exchange.
b). How the kidnapped soldier Gilad Shalit managed to return home.
c). The stories of many terrorist attack victims.
d). Life of every single Israeli is highly valued.
The answer is:
a).