Question

read the two texts.
text 1
tanks were invented during world war i when the british military needed a cutting-edge war machine that could drive over rough battlefield terrain and break through enemy lines. the military built a heavily armored automobile with a large gun and treads instead of tires. the first tanks were noisy, hot, and slow, and they often broke down; however, later in the war they improved and became powerful fighting machines.
text 2
invented during world war i, the hydrophone was essentially an underwater microphone that was used to locate enemy submarines. it took three inventors—a canadian, a frenchman, and a russian—to create a hydrophone that allowed the user to identify both the distance and the direction of the sound coming from a submarine. during the war, a british vessel was the first ship to use a hydrophone to locate a german submarine and then destroy it.
which sentence best combines the main, or central, ideas of both texts?
the hydrophone and the tank were introduced during world war i, but both new technologies were riddled with problems from the outset.
the tank was developed during world war i to allow the british military to travel over harsh terrain to defeat the enemy
the tank and the hydrophone were two technological advancements that contributed to the british war effort during world war i.

Explanation:

1. Analyze the first option: The text about the hydrophone doesn't mention it having problems from the start, so this option is incorrect.
2. Analyze the second option: This option only talks about the tank, not the hydrophone, so it doesn't combine the main ideas of both texts.
3. Analyze the third option: Text 1 is about the tank (a technological advancement) developed during WWI for the British military's war effort. Text 2 is about the hydrophone (another technological advancement) used by the British during WWI for their war effort. This option correctly combines the main ideas of both texts.

Answer:

The tank and the hydrophone were two technological advancements that contributed to the British war effort during World War I.