The most moderate correlation here would be 0.56. A correlation of 0 represent zero correlation. Normal Pearson correlation efficients range from +1 to -1. Closer the whole number, 1, indicates a stronger correlation with the + and - indicating positive or negative correlations, respectively.
The statement that describes the effect of the unreliable narrator in this passage is that, readers experience a growing sense of suspense about what the unstable narrator might do next. The correct answer the best fits the given question above is option A.