Reading Pages 80-98

As many people mentioned in previous blogs, technology was a new and prominent development in WWI. Was it technology that gave the Central Powers such a head start in the war front? Germany was the first to use Chlorine gas (which the British attempted to use also and failed), phosgene gas, U-boats, and unrestricted submarine warfare. The Allies didn't have any real new, major developments until the armoured tank. Was technology what gave the Central Powers such momentum, but was it also what hurt them in the end?

Reading Pages 102-115

I was slighty confused by question 9. "was German 'unrestricted submarine warfare' an unavoidable mistake'?"
I understood the explanation of how Germany launched the expeditions because of desperation, and that the Kaiser reluctantly gave his approval after pressured begging from the civilian leaders. But what I didn't understand fully for whom would it be an unavoidable mistake?? The allies, the other central powers, Germany? I thought Germany would consider it an avoidable mistake because of the desperation, but it doesn't really seem like Germany considered it a mistake; even after failing. And it also really couldn't be described as 'unavoidable'. So i guess i am just questioning who this label would be coming from?