Which of the following are the suitable headlines for the pieces of news?
a. US Defense Secretary Visit Likely b. France Confirms "Mad Goat Case" c. Nokia Stays on Top d. Birds of a Feather
a. Defense Policy Dialogue b. Mad Goat Disease c. Mobile Phone Sales d. Importing Female Penguins
a. Sino-US Talks b. Mad Goat Case c. Motorola's Sales Reduced          d. Boys and Girls
a. US Defense Secretary Visit Likely b. France Confirms "Mad Goat Case" c. Mobile Phone Sales d. Male Penguins and Female Penguins