Please help. will upvote

23. Based on the two tables above, what must have been the strongest point of this portfolio manager's performance? A. Telecom sector security selection decision B. Materials sector allocation decision C. Industrials sector allocation decision D. Telecom sector allocation decision Sector Benchmark Benchmark weights (Wsb) ETFs Returns (Rsb) Stocks Holding Weights (Wsh) Holdings Returns (Rsh) Telecom Materials Industrials XTL XLB 0.50 0.30 0.20 4.88% 3.34% 3.96% TROW KLAC 0.52 0.25 0.23 4.73% 1.93% 4.86% XLI KO Benchmark (R tot b) Portfolio (R tot p) Difference 4.23% 4.06% -0.17% Sector Allocation Selection Interaction Sum Telecom Materials Industrials -1.99% 5.04% -3.01% -0.08% -0.42% 0.18% 0.00% 0.07% 0.03% -2.06% 4.69% -2.80% Sum 0.05% -0.32% 0.09% -0.17%