In German, 'einhundert siebzig' means 'one hundred seventy' = 170. It breaks down as 'ein' (one) + 'hundert' (hundred) + 'siebzig' (seventy). Note that 'sieben' becomes 'siebzig' in the compound number form. Option B would be 'einhundert fünfzig' (150) and option D would be 'einhundert neunzig' (190).