i fink if u have proper reasoning u'll get the marks.
isaac's studied a yr of uni and knows how a bond operates, so given the context of the real world, his view is correct. On the other hand, econ110 is a basic course, so mein's, dwh2427's and friend's long term argument that u wait for self fullfilling prophecy to happen is also arguable...however in this case...i think he needs to read the question properly.
Question says "European central banks will lower interest rates", this means european cb controls the interest rate. Which means interest rate is exogenous. Self fullfilling prophecy is governed by market forces and it aint gonna happen if CB controls R.
In simple words, its not gonna happen unless CB wants it to.
edit:
even if R wasnt exogenous, i'd still go wiv isaac's argument though. u might wanna check out tutorial 4, i think its similar in some aspects:
Use diagrams to illustrate the effect of the following on the investment demand
curve and the equilibrium rate of investment:
i) A decrease in the rate of interest.
ii) A general expectation of lower returns from the production and sale of
iii) An unexpected decrease in the price of capital goods.
iv) A general expectation that capital goods will fall in price next year.
edit2:
ive deleted the flaming from earlier to save some embarassment due to the sudden change of events...